Jacketed tank.



619,, i WW W. C. HONHORST.

JACKETED TANK.

APPLICATION FILED MAY22. 1914.

1,155,731. Patented 001;. 5, 1915.

OFFICE.

WILLIAM G. HONHOBST, 0F NEWPORT, KENTUCKY.

JAGKETED TANK.

Specification of Letters Patent.

Patented Oct. 5, 1915.

Application filed May 22, 1914. Serial No. 840,157.

To all whom it may concern:

Be it known'that I,WILLIAM C. Hon- HORST, residing at Newport, Campbellcounty, State of Kentucky, have invented a certain new and usefulImprovement in Jacketed Tanks, of which the following is a clear, full,and exact description, attention being called to the drawing whichaccompanies this application and forms a part thereof.

There are tanks used for rendering and cooking purposes, for dryingfertilizer material etc, in which the necessary heat is ap: plied inform of steam, admitted directly to the tanks and their contents andalso applied by means of a jacket surrounding such tanks. Tanks used inthe production of fertilizer, and for rendering lard on a large scaleare types here under consideration.

The invention concerns the construction of such tanks as described andpointed out in the following specification and claims and as illustratedin the accompanying drawing in which: Figure 1. shows a front view ofthe lower part of such a tank. Fig. 2. shows on enlarged scale avertical section through the center of the door-opening and adjacentparts, portions between top and bottom of the opening being broken outto reduce the height of the figure. Fig. 3. shows a similar sectiontaken on line 3+3 of Fig. 1. Fig. a. shows the lower part of Fig. 2, theconstruction being slightly modifie The tanks are charged with thesubstance to be treated, through an opening in the top, not shown. Thetreatment is by heat in form of steam under substantial pressure, thesteam being admitted to the tank and also to the jacket or to eitheronly, according to circumstances and particular purposes had in view.Where steam is admitted to the tank directly, this is usually for a timeonly, after which the product is reduced and finished by heat applied tothe jacket, the steam being shut oif from the tank. Separated matter andwater are drawn off from the tank at various levels and the product isfurther reduced by heat applied by means of the j ackct only; Use of avacuum forms also part of the treatment resorted to in some processes.Remaining substance or residue are removed through an opening A in thelower part of the tank, the opening being surrounded by a frame a. Thisframe serves for the purpose of receiving the door by which the openingA is closed while the heat treatment is proceeding. In view of the steampressure to be resisted, this frame as well as the door and the means ofattachment for seating it upon the frame are of substantial constructionand strength. Bolts adjustably or removably applied are generally usedto hold the door in place on the frame. These bolts may be applied invarious ways and since no novelty is claimed for this feature, nor forthe door, these parts are omitted from the drawing. I11 other wordsopening A is shown with the door removed and as it wouldappear at theend of an operation when it is open to permit the tank to be cleared. Itis essential to the ex peditious manipulation of the matter to beremoved that the lower edge of the door opening as presented by thelower part or sill of the door frame is not above the bottom of thetank. It might be below this bottom but by preference it should be eventherewith. Compliance with this requirement presents quite a problem andproduces certain'complications in the practical construction of suchtanks in view of the fact that it locates the means for connecting thelower part of the door frame and the means for forming a part of thejacket of the bottom in practically the same position. These meansinvolve the use of rivets which are used in the construction and sinceleakage frequently takes place around them, location of rivets whereexposed at one of their ends to steam-pressure must be such that, whileovercoming the aforesaid complications as to location, access to therivets is also made possible to permit replacing of defective rivets atany time. These complications are overcome by a construction whichsatisfies also the last mentioned requirement and is as follows:

Numeral 5 indicates the wall preferably boiler steel which forms the,usually cylindrical, side of the'ta-nk. It contains dooropening A whichis cut into the steel plate in such a position that its lower edge is inline with bottom 6 of the tank and some distance above the lower edge ofthe wall. The door-frame is formed so that its four sides are coincidentwith the edges of this opening. It is also desirable that the lower edgeof this opening and the lower side or sill 7 of the frame are not abovebottom 6 of the tank and preferably alined therewith so that thecontents of the tank may be convenientl-y removed and raked out withoutan interfering obstruction. In constructions as heretofore carried outsuchalinemerrt was rendcred impossible in View of the manner in whichthe jacketed bottom was con-- structed.

.The door-frame. is provided with an attaching flange 8 whereby it isattached to side 5 of the tank so as to surround opening A therein. Thisis by rivets. and the inner heads 'of'these rivets, at least as far asthey" are used for connecting the lower flange, are

. countersunk as shown for rivets B is the acket space which surroundsthe side of the tank and is formed by this side 5 and by a jacket wall10 outside thereof and held spaced therefrom by a spacing frame 11. Thisframe follows the shape of the door frame around the outer ed 'es of thelower flange S of the door-frame to permit connection with wall 5 of'thetank below said flange 8 and entirely independent thereof. Thisconnection is by rivets 16 which pass through the two flanges andthrough wall 5 of the tank as best shown in Figs. 2 and 3.

' In the modified construction shown in Fig. 4, a spacing ring 17 isprovided in place of the annular flange on the underside of inner bottom6. Rivets 18 serve to hold. the bottom to this ring and to the outerbottom 13 in a manner to form the jacket space C between the twobottoms.

It will now be seen that 1n e1ther case rivet heads wherever exposed tosteam pressure are not overlapped or rendered inaccessible by parts ofthe structure, so that defective rivets, causing leakage may be cut outreadily at any tune and replaced. On the other hand, whereverrivet-heads, are inaccessible, as for instance, in the'case of the innerheads of rivets 9, removal: on. account of leakage is never called for,since noleakage can occur at these places because they are" not exposedto steam-pressure.

lower edge of the door-opening inv V the jacket space.

I wa-ll'5, and-the sill the door-frame not 11* which serves to spaceWalls 5 and 10 around the door frame may be omitted, and parts of flange80fv this latter frame may serve for this purpose, the width of theflange being enlarged to the necessary extent and its thickness arrangedto correspond to I-Iavi-ng' described my invention, I claim as new: 7 Q

1., In a. tank of the character described, the combination of a sidewall provided with a door-opening, a dooeframe fitted to this opening:and provided with an attaching flange, rivets whereby said flange issecured tothe side wall, the-inner ends of these rivets WlllGl-l arebelow the door-opening being countersunk, a. bottom positioned so. as toaline with the lower edge of the opening in said side wall and providedwith. a clownwardly projecting; flange fitted against, the. inner-sideofsaid wall and opposite the countersunk rivets. so as to coyer the innerheads of theserivets and exclude them from. exposure to. steamrpressure,anouter bottom spaced from the. first bottom. and provided with asimilar flange which is fitted against the inner; side of theflange ofsaid first bottom and rivets passing through both these flanges andthrough the side wall below the door frame, for connecting these partsto each other. 7

2, In a tank of the character described, the combination of aside wallprovided with a door opening, a doorframefitted to, this. 1 opemng andPLOVldfifl with an attaching flange, rivets whereby said flange issecured to the sidewall, an inner bottom and an outer bottom withspacing ring? between them. and rivets whereby these bottoms. aresecured to each other and to the sidewall and in a, manner that theinner bottom; alineswith the lower edge of the door-opening and that theinner heads of those of the rivets first mentioned which are below thedooropening are covered so as to. be beyond the effects ofsteam-pressure.

Intestimony whereof I hereunto afiix my signature in the presence of twowitnesses.

WILLIAM C. HONHORST.

itnesses:

G. Sranerr, A. JoHNsom Gopitsof this patent may be. ohtai-nfiflifor fivecents. eac11, by addressing the Gommissionerof Patents,

' t'- Washington, D. G. Y r

